衰すい退たい期き

noun

phase of decline; ebb; twilight

Refers to a period when something is losing strength, influence, or vitality. Often used in historical, economic, or biological contexts.

• ローマ帝てい国こくは衰すい退たい期きに入はいっていた。

  The Roman Empire had entered a phase of decline.

• その産さん業ぎょうは衰すい退たい期きを迎むかえている。

  That industry is facing a period of decline.